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.tree-dialog .lightbox-image{background:#fffcf8}
.back-cover{left:0;transition:none;box-shadow:inset -6px 0 8px #14080745,-6px 7px 0 #cbb99c,-8px 10px 0 #4d2a29,-10px 27px 48px #09050390}
.close-leaf{display:none;position:absolute;top:0;left:50%;width:50%;height:100%;z-index:7;transform-origin:left center;transform-style:preserve-3d;pointer-events:none}
.closing-face{position:absolute;inset:0;backface-visibility:hidden;overflow:hidden}
.closing-paper{background:var(--paper);color:var(--ink)}
.closing-cloth{transform:rotateY(180deg);background:#53272c url('assets/cover.jpg') center/cover;color:var(--gold);border-radius:4px;box-shadow:inset -6px 0 8px #14080745}
.closing-cloth blockquote{font-family:var(--serif);font-size:24px;line-height:2;letter-spacing:.09em;position:absolute;left:14%;right:12%;top:37%;margin:0}
.book.closing-ready .close-leaf{display:block;will-change:transform;transform:rotateY(0)}
.book.closing .close-leaf{display:block;animation:closeToLeft .7s cubic-bezier(.4,0,.2,1) both}
.book.closing .back-cover{animation:none}
.book.closing-ready .spread{opacity:1;transition:none;box-shadow:none}
.book.closing-ready .right-page{visibility:hidden}
.book.closing-ready .front-cover{visibility:hidden;transition:none}
.book.closed-back .spread{display:none;opacity:0;visibility:hidden;box-shadow:none;transition:none}
.book.closed-back .front-cover{display:none;visibility:hidden;box-shadow:none;transition:none}
.book.at-cover .front-cover{transition:none}
.rewind-pages{display:none;position:absolute;inset:0;pointer-events:none;z-index:6;transform-style:preserve-3d}
.rewind-pages i{position:absolute;left:50%;top:0;width:50%;height:100%;transform-origin:left center;background:#f9f2e3;border:1px solid #cabda377;box-shadow:2px 0 3px #3c2d261a;transform:rotateY(-180deg);animation:rewindLeaf .4s cubic-bezier(.2,.5,.4,1) both}
.rewind-pages i:nth-child(2){animation-delay:.065s;background:#f3ead8}
.rewind-pages i:nth-child(3){animation-delay:.13s}
.book.rewinding .rewind-pages{display:block}
.book.rewinding .front-cover{z-index:8;opacity:1;transition:none;animation:rewindCover .42s .18s cubic-bezier(.2,.5,.4,1) both}
.book.rewinding .spread{opacity:1;transition:none}
.return-bookmark{position:absolute;right:22px;top:-13px;z-index:9;display:flex;align-items:center;gap:7px;color:#eee3ce;background:#78664f;padding:11px 13px 17px;font-size:12px;letter-spacing:.06em;clip-path:polygon(0 0,100% 0,100% 100%,50% calc(100% - 5px),0 100%);box-shadow:0 2px 3px #1d151333;transition:background .2s}
.return-bookmark:hover{background:#635641}
.return-bookmark{top:-25px}
.return-bookmark:focus-visible{outline:none;background:#564a38;text-decoration:underline;text-underline-offset:4px}
.desk.is-back .return-bookmark{right:calc(50% + 22px)}
@keyframes closeToLeft{from{transform:rotateY(0)}to{transform:rotateY(-180deg)}}
@keyframes rewindLeaf{0%{transform:rotateY(-180deg);opacity:1}85%{opacity:1}100%{transform:rotateY(0);opacity:0}}
@keyframes rewindCover{from{transform:rotateY(-180deg)}to{transform:rotateY(0)}}
@media(max-width:800px){
  .chapter-page h2.chapter-title{font-size:30px;gap:20px;margin-top:30px}
  .left-page{background:#faf5e9}
  .close-leaf,.rewind-pages i{left:0;width:100%;transform-origin:center}
  .book.rewinding .front-cover{transform-origin:center}
  .desk.is-back .return-bookmark{right:16px}
  .return-bookmark{right:16px;top:-23px;font-size:12px;padding:9px 12px 15px}
  .search-wrap input,#note-form input,#note-form textarea{font-size:16px}
}
/* Compact navigation: outside covers flank the quiet page controls. */
.reader-nav{display:grid;grid-template-columns:auto 42px minmax(108px,1fr) 42px auto;gap:18px;width:min(470px,calc(100% - 32px));align-items:center}
.page-control{min-width:0}
.cover-tab{padding:9px 10px;min-height:42px;border-block:1px solid #bca88655;color:#e1d2b9;font-size:14px;white-space:nowrap}
.cover-tab:hover:not(:disabled){background:#e4d0a51c}
.cover-tab:disabled,.nav-arrow:disabled{opacity:.35;cursor:default}
#closed-label{display:block;color:#bdac92;font-size:13px;letter-spacing:.12em}
#jump-form{gap:6px}
.note-host{display:block;text-align:right;font-size:14px;margin-top:10px}
.local-notice a{text-decoration:underline;text-underline-offset:3px;overflow-wrap:anywhere}
.email-fallback{margin-top:18px;display:flex;flex-direction:column;align-items:flex-start;gap:10px}
.email-fallback button{border:1px solid #aa977766;padding:8px 12px;font-size:14px;min-height:38px;color:#6d5b45}
.email-fallback span{font-size:12px;line-height:1.8;color:#917c61}
#saved-notes{margin-top:26px;border-top:1px solid #bfae8f55;padding-top:17px;font-size:12px;color:#816c50}
#saved-notes summary{cursor:pointer;line-height:1.8}
@media(max-width:800px){.reader-nav{grid-template-columns:auto 38px minmax(94px,1fr) 38px auto;gap:7px;width:calc(100% - 28px)}.reader-nav .nav-arrow{width:38px;height:42px}.cover-tab{padding:8px 6px}#page-input{width:36px}}
@media(max-width:360px){.reader-nav{grid-template-columns:auto 32px minmax(80px,1fr) 32px auto;gap:5px}.reader-nav .nav-arrow{width:32px;height:38px}.cover-tab{padding-inline:3px;font-size:13px}#jump-form{gap:3px}#jump-form>label{display:none}#page-input{width:32px}}
@media(prefers-reduced-motion:reduce){*,*:before,*:after{animation-duration:.001ms!important;transition-duration:.001ms!important;scroll-behavior:auto!important}}
/* Four quiet symbols. The closed front cover only offers its corner opening. */
.reader-nav{grid-template-columns:repeat(4,44px);width:auto;gap:20px}
.reader-nav .nav-arrow{position:relative;display:grid;place-items:center;width:44px;height:44px;padding:10px;border:0;border-radius:50%;color:#e8d9bf}
.nav-arrow svg{width:24px;height:24px;fill:none;stroke:currentColor;stroke-width:1.4;stroke-linecap:round;stroke-linejoin:round}
.nav-arrow:after{content:attr(data-tip);position:absolute;bottom:calc(100% + 9px);left:50%;transform:translateX(-50%);padding:7px 10px;border-radius:4px;background:#30271fea;color:#eee3ce;font-size:12px;white-space:nowrap;opacity:0;visibility:hidden;pointer-events:none;transition:opacity .15s}
.nav-arrow:not(:disabled):hover:after,.nav-arrow:not(:disabled):focus-visible:after{opacity:1;visibility:visible}
@media(max-width:800px){.reader-nav{grid-template-columns:repeat(4,44px);gap:16px;width:auto}}
.book{z-index:2;pointer-events:none}.book .spread,.book .cover{pointer-events:auto}
.title-page h2{white-space:nowrap;flex-shrink:0;font-size:clamp(30px,calc(var(--page-h) / 18),42px);margin:24px 0}
.book:not(.open) .spread,.book.closed-back .spread{pointer-events:none}
.book.open .front-cover{pointer-events:none}
.toolbar-actions{display:flex;align-items:center;gap:26px}
.music-button{min-width:64px;min-height:44px;transition:color .15s,background-color .15s;position:relative}
.music-button svg{width:20px;height:20px;fill:none;stroke:currentColor;stroke-width:1.5;stroke-linecap:round;stroke-linejoin:round}
.music-button[aria-pressed="true"]{color:#f8eddb}
.music-button[aria-pressed="true"]:after{content:"";position:absolute;left:0;right:0;bottom:4px;height:1px;background:currentColor;opacity:.65}
.music-status{position:fixed;z-index:9;top:70px;right:38px;max-width:calc(100vw - 28px);margin:0;padding:12px 16px;font-size:13px;line-height:1.7;color:#604d39;background:#f5efe2;border-radius:4px;box-shadow:0 4px 20px #17100b30}
.form-honeypot{position:absolute;left:-10000px;width:1px;height:1px;overflow:hidden}
#note-status:empty{display:none}#note-status{font-size:14px;line-height:1.8;margin-top:18px}
@media(max-width:800px){.book-stage{margin-left:0;flex-shrink:0}.toolbar-actions{gap:16px}.music-status{top:64px;right:14px}.music-button{min-width:44px;font-size:0;gap:0;justify-content:center}}
@media(max-width:360px){.toolbar-actions{gap:8px}.toolbar{padding-inline:14px}.wordmark{font-size:19px;letter-spacing:.1em}.tool-button{gap:5px;font-size:12px}.music-button{font-size:0}}
/* Cover motion has one timeline and no delayed fade or invisible animated layer. */
.front-cover{transition:none}
.book.open .front-cover{display:none}
.open-leaf{display:none;position:absolute;left:50%;top:0;width:50%;height:100%;z-index:7;transform-origin:left center;transform-style:preserve-3d;pointer-events:none}
.book.opening .open-leaf{display:block;will-change:transform;animation:openFrontCover .56s cubic-bezier(.3,.15,.35,1) both}
.opening-face{position:absolute;inset:0;backface-visibility:hidden}
.opening-cloth.cover{left:0;top:0;width:100%;height:100%;transition:none}
.opening-paper{transform:rotateY(180deg);background:#faf5e9;overflow:hidden;border-radius:4px 0 0 3px}
.opening-paper .page-body{left:42px;right:45px}
.book.opening .spread{transition:none;opacity:1;box-shadow:none}
@media(min-width:801px){.book.opening .left-page{visibility:hidden}}
.book.rewinding .front-cover{display:block;visibility:visible;will-change:transform}
.open-corner svg{width:24px;height:24px;fill:none;stroke:currentColor;stroke-width:1.5;stroke-linecap:round;stroke-linejoin:round;flex-shrink:0}
@keyframes openFrontCover{from{transform:rotateY(0)}to{transform:rotateY(-180deg)}}
@media(max-width:800px){.open-leaf{left:0;width:100%;transform-origin:left center}.opening-paper{visibility:hidden}}
.music-tools{display:flex;align-items:center;gap:2px}
.music-button.is-playing{color:#fff5df}
.music-button.is-playing:after{content:"";position:absolute;inset:auto 0 4px;height:1px;background:currentColor;opacity:.65}
.music-quick-pause{display:grid;place-items:center;width:44px;height:44px;border-radius:50%;padding:12px}
.music-quick-pause:hover{background:#e4d0a51c}
.music-quick-pause svg,#music-dialog svg{width:22px;height:22px;fill:none;stroke:currentColor;stroke-width:1.5;stroke-linecap:round;stroke-linejoin:round;flex-shrink:0}
#music-dialog{width:min(480px,calc(100vw - 32px));max-height:calc(100svh - 48px);overflow:auto;overscroll-behavior:contain;border:1px solid #d4c6af;border-radius:12px;padding:30px;background:#f8f3e8;color:#473d32;box-shadow:0 18px 60px #160d0840}
#music-dialog::backdrop{background:#1c140ec2}
.music-header{display:flex;align-items:flex-start;gap:16px;justify-content:space-between}
.music-header .eyebrow{font-size:11px;color:#756652}
.music-header h2{font:25px/1.55 var(--serif);margin:12px 0 0;text-wrap:balance}
.music-header .icon-button{display:grid;place-items:center;width:44px;height:44px;flex-shrink:0;margin:-12px -12px 0 0;border-radius:50%}
.music-header .icon-button:hover{background:#e9dfce}
#music-description{font-size:13px;line-height:1.8;color:#72644f;margin:14px 0 22px}
.music-tracks{list-style:none;padding:0;margin:0;border-top:1px solid #d8ccb8;max-height:min(38svh,360px);overflow-y:auto;overscroll-behavior:contain;scrollbar-width:thin;scrollbar-color:#ac987d transparent}
.music-tracks li{border-bottom:1px solid #ded4c4}
.music-track{width:100%;display:flex;align-items:center;gap:14px;text-align:left;padding:15px 10px;min-height:68px;border-radius:4px;transition:background-color .15s}
.music-track:hover{background:#eee6d8}
.music-track[aria-current]{background:#e8ddca}
.track-number{font:13px Georgia,serif;color:#786851;min-width:18px}
.track-copy{display:flex;flex-direction:column;gap:5px;flex:1;min-width:0}
.track-title{font-size:15px;line-height:1.45;overflow-wrap:anywhere}
.track-artist{font-size:12px;color:#766750;line-height:1.5}
.track-state{font-size:11px;white-space:nowrap;color:#69553d}
.music-player{margin-top:24px}
#music-now{font-size:12px;line-height:1.7;color:#72644f;margin:0 0 12px;overflow-wrap:anywhere}
.music-transport{display:flex;align-items:center;gap:18px}
.music-play{min-height:44px;display:flex;align-items:center;gap:8px;font-size:14px;white-space:nowrap;padding:8px 12px;border-radius:6px;background:#69503d;color:#fff8eb}
.music-play:hover{background:#55412f}
.music-progress{flex:1;min-width:0}
#music-seek{display:block;width:100%;height:28px;margin:0;accent-color:#7b6247;cursor:pointer;touch-action:auto}
.music-time{display:flex;justify-content:space-between;gap:12px;font-size:11px;font-variant-numeric:tabular-nums;color:#72644f}
#music-status{margin:14px 0 0;font-size:13px;line-height:1.7;color:#733e33}
#music-status:empty{display:none}
#music-dialog :focus-visible,.open-corner:focus-visible{outline:2px solid #88734f;outline-offset:3px}
.open-corner:focus-visible{outline-color:#f0d6a6;outline-offset:-4px}
.music-tools :focus-visible{outline:2px solid #e4d3b4;outline-offset:2px}
@media(max-width:800px){.toolbar-actions{gap:10px}.music-tools{gap:0}.music-quick-pause{width:44px;min-height:44px;padding:11px}}
@media(max-width:480px){#toc-toggle{font-size:0;gap:0;width:44px;height:44px;justify-content:center}.music-button{min-width:44px}}
@media(max-width:360px){.toolbar-actions{gap:6px}.wordmark{font-size:18px;letter-spacing:.05em}#music-dialog{padding:24px 18px}.music-header h2{font-size:23px}.music-track{gap:10px;padding-inline:6px}.track-state{font-size:10px}}

/* Unframed photographs: the caption takes its natural height before the image is sized. */
.album-photo{position:relative;isolation:isolate;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:24px;height:100%;margin:0;padding:24px 10px;font-size:15px;line-height:1.8}
.album-image{position:relative;min-height:0;flex:0 1 auto;max-width:100%;display:flex;align-items:center;justify-content:center}
.album-image:before,.chapter-page:after{content:none;display:none}
.album-image button{display:flex;align-items:center;justify-content:center;min-height:0;max-width:100%;height:100%;padding:0;border:0;background:transparent;border-radius:0;box-shadow:none;cursor:zoom-in}
.album-image img{display:block;width:auto;height:auto;min-width:0;min-height:0;max-width:100%;max-height:100%;object-fit:contain;filter:none;border:0;border-radius:0;box-shadow:none}
.album-caption{flex:none;align-self:stretch;margin:0;font-family:"Kaiti SC","STKaiti",var(--serif);font-size:inherit;line-height:inherit;color:var(--ui-secondary);text-align:start;overflow-wrap:anywhere}
.album-photo-long{font-size:14px;line-height:1.75}
@media(max-width:800px){.album-photo{padding:18px 4px;gap:22px}}

/* Centered album edition — one quiet canvas, one compact control surface. */
:root{
  --viewer-bg:#efdfdd;--surface:#fffdfb;--paper:var(--surface);--surface-hover:#f4efed;
  --surface-selected:#eee6e3;--ui-text:#433d3b;--ui-secondary:#6d625e;
  --ui-line:#e3dad5;--ui-focus:#695750;--accent-solid:#76534d;
  --cover-duration:.68s;--return-duration:.62s;--cover-ease:linear;
}
body{background:var(--viewer-bg);color:var(--ui-text)}
body:before{display:none}
/* The reading paper and toolbar share one warm-white surface, including turning leaves. */
.page,.left-page,.right-page,.opening-paper,.closing-paper,.turn-leaf,.rewind-pages i,.rewind-pages i:nth-child(2){background:var(--paper)}
.page:after{content:none;background:none}
.right-page{border-left-color:var(--ui-line)}
.desk{min-height:100svh;padding:30px 76px 102px;align-items:center;justify-content:center}
.book-stage{margin:0;flex-shrink:0;perspective:5000px}
.book{transform:translateX(-25%)}
.book.open{transform:translateX(0)}
.book.closed-back{transform:translateX(25%)}
.book.opening{animation:centerOpen var(--cover-duration) var(--cover-ease) both}
.book.closing{animation:centerClose var(--cover-duration) var(--cover-ease) both}
.book.opening .open-leaf{animation-duration:var(--cover-duration);animation-timing-function:var(--cover-ease)}
.book.closing .close-leaf{animation-duration:var(--cover-duration);animation-timing-function:var(--cover-ease)}
.spread{transition:none;box-shadow:0 3px 0 var(--ui-line),0 5px 0 #7a554e,0 14px 30px #52312b22}
.cover{box-shadow:inset 7px 0 10px #14080744,inset -1px 0 1px #11050444,3px 3px 0 var(--ui-line),5px 5px 0 #68403e,0 16px 30px #52312b30}
.back-cover{box-shadow:inset -5px 0 8px #14080733,-3px 3px 0 var(--ui-line),-5px 5px 0 #68403e,0 16px 30px #52312b30}
.book.opening .opening-cloth{box-shadow:inset 7px 0 10px #14080744}
.book.opening .opening-cloth.cover{transform:none;opacity:1;display:block}
.book.open .spread{cursor:pointer}
.book.closing-ready .spread,.book.opening .spread{box-shadow:none}
.book.at-cover .front-cover{cursor:pointer}
@keyframes centerOpen{0%{transform:translateX(-25.0000%)}6.25%{transform:translateX(-25.0000%)}12.5%{transform:translateX(-25.0000%)}18.75%{transform:translateX(-25.0000%)}25%{transform:translateX(-25.0000%)}31.25%{transform:translateX(-25.0000%)}37.5%{transform:translateX(-25.0000%)}43.75%{transform:translateX(-25.0000%)}50%{transform:translateX(-25.0000%)}56.25%{transform:translateX(-17.4582%)}62.5%{transform:translateX(-10.8609%)}68.75%{transform:translateX(-5.8485%)}75%{transform:translateX(-2.5995%)}81.25%{transform:translateX(-0.8709%)}87.5%{transform:translateX(-0.1785%)}93.75%{transform:translateX(-0.0114%)}100%{transform:translateX(0.0000%)}}
@keyframes centerClose{0%{transform:translateX(0.0000%)}6.25%{transform:translateX(0.0114%)}12.5%{transform:translateX(0.1785%)}18.75%{transform:translateX(0.8709%)}25%{transform:translateX(2.5995%)}31.25%{transform:translateX(5.8485%)}37.5%{transform:translateX(10.8609%)}43.75%{transform:translateX(17.4582%)}50%{transform:translateX(25.0000%)}56.25%{transform:translateX(25.0000%)}62.5%{transform:translateX(25.0000%)}68.75%{transform:translateX(25.0000%)}75%{transform:translateX(25.0000%)}81.25%{transform:translateX(25.0000%)}87.5%{transform:translateX(25.0000%)}93.75%{transform:translateX(25.0000%)}100%{transform:translateX(25.0000%)}}
.return-leaf{display:none;position:absolute;left:0;top:0;width:50%;height:100%;transform-origin:right center;transform-style:preserve-3d;z-index:8;pointer-events:none}
.return-face{position:absolute;inset:0;backface-visibility:hidden}
.return-inside{transform:rotateY(180deg)}
.return-face>.page{width:100%}
.return-face .return-cover-copy.cover{left:0;width:100%;transform:none;opacity:1;display:block;visibility:visible;box-shadow:inset 5px 0 9px #14080733}
.book.rewinding{animation:centerReturn var(--return-duration) var(--cover-ease) both}
.book.rewinding.rewind-from-back{animation-name:centerReturnFromBack}
.book.rewinding .return-leaf{display:block;animation:returnFrontCover var(--return-duration) var(--cover-ease) both;will-change:transform}
.book.rewinding .front-cover,.book.rewinding .back-cover{display:none!important;animation:none}
.book.rewinding .left-page{visibility:hidden}
.book.rewinding .return-face>.left-page{visibility:visible}
.book.rewinding .spread{box-shadow:none}
.book.rewinding.rewind-from-back .spread{display:none}
@keyframes returnFrontCover{0%{transform:rotateY(0.0000deg)}6.25%{transform:rotateY(1.7293deg)}12.5%{transform:rotateY(6.8508deg)}18.75%{transform:rotateY(15.1677deg)}25%{transform:rotateY(26.3604deg)}31.25%{transform:rotateY(39.9987deg)}37.5%{transform:rotateY(55.5585deg)}43.75%{transform:rotateY(72.4419deg)}50%{transform:rotateY(90.0000deg)}56.25%{transform:rotateY(107.5581deg)}62.5%{transform:rotateY(124.4415deg)}68.75%{transform:rotateY(140.0013deg)}75%{transform:rotateY(153.6396deg)}81.25%{transform:rotateY(164.8323deg)}87.5%{transform:rotateY(173.1492deg)}93.75%{transform:rotateY(178.2707deg)}100%{transform:rotateY(180.0000deg)}}
@keyframes centerReturn{0%{transform:translateX(0.0000%)}6.25%{transform:translateX(-0.0114%)}12.5%{transform:translateX(-0.1785%)}18.75%{transform:translateX(-0.8709%)}25%{transform:translateX(-2.5995%)}31.25%{transform:translateX(-5.8485%)}37.5%{transform:translateX(-10.8609%)}43.75%{transform:translateX(-17.4582%)}50%{transform:translateX(-25.0000%)}56.25%{transform:translateX(-25.0000%)}62.5%{transform:translateX(-25.0000%)}68.75%{transform:translateX(-25.0000%)}75%{transform:translateX(-25.0000%)}81.25%{transform:translateX(-25.0000%)}87.5%{transform:translateX(-25.0000%)}93.75%{transform:translateX(-25.0000%)}100%{transform:translateX(-25.0000%)}}
@keyframes centerReturnFromBack{0%{transform:translateX(25.0000%)}6.25%{transform:translateX(24.9886%)}12.5%{transform:translateX(24.8215%)}18.75%{transform:translateX(24.1291%)}25%{transform:translateX(22.4005%)}31.25%{transform:translateX(19.1515%)}37.5%{transform:translateX(14.1391%)}43.75%{transform:translateX(7.5418%)}50%{transform:translateX(0.0000%)}56.25%{transform:translateX(-7.5418%)}62.5%{transform:translateX(-14.1391%)}68.75%{transform:translateX(-19.1515%)}75%{transform:translateX(-22.4005%)}81.25%{transform:translateX(-24.1291%)}87.5%{transform:translateX(-24.8215%)}93.75%{transform:translateX(-24.9886%)}100%{transform:translateX(-25.0000%)}}
@keyframes openFrontCover{0%{transform:rotateY(0deg)}6.25%{transform:rotateY(-1.7293deg)}12.5%{transform:rotateY(-6.8508deg)}18.75%{transform:rotateY(-15.1677deg)}25%{transform:rotateY(-26.3604deg)}31.25%{transform:rotateY(-39.9987deg)}37.5%{transform:rotateY(-55.5585deg)}43.75%{transform:rotateY(-72.4419deg)}50%{transform:rotateY(-90deg)}56.25%{transform:rotateY(-107.5581deg)}62.5%{transform:rotateY(-124.4415deg)}68.75%{transform:rotateY(-140.0013deg)}75%{transform:rotateY(-153.6396deg)}81.25%{transform:rotateY(-164.8323deg)}87.5%{transform:rotateY(-173.1492deg)}93.75%{transform:rotateY(-178.2707deg)}100%{transform:rotateY(-180deg)}}
@keyframes closeToLeft{0%{transform:rotateY(0deg)}6.25%{transform:rotateY(-1.7293deg)}12.5%{transform:rotateY(-6.8508deg)}18.75%{transform:rotateY(-15.1677deg)}25%{transform:rotateY(-26.3604deg)}31.25%{transform:rotateY(-39.9987deg)}37.5%{transform:rotateY(-55.5585deg)}43.75%{transform:rotateY(-72.4419deg)}50%{transform:rotateY(-90deg)}56.25%{transform:rotateY(-107.5581deg)}62.5%{transform:rotateY(-124.4415deg)}68.75%{transform:rotateY(-140.0013deg)}75%{transform:rotateY(-153.6396deg)}81.25%{transform:rotateY(-164.8323deg)}87.5%{transform:rotateY(-173.1492deg)}93.75%{transform:rotateY(-178.2707deg)}100%{transform:rotateY(-180deg)}}

.toolbar{position:fixed;inset:auto auto max(18px,env(safe-area-inset-bottom)) 50%;transform:translateX(-50%);height:60px;width:max-content;max-width:calc(100vw - 24px);padding:7px 10px;display:flex;gap:4px;align-items:center;justify-content:center;background:var(--surface);color:var(--ui-text);border:0;border-radius:12px;box-shadow:0 0 0 1px #00000008,0 2px 4px #00000008,0 8px 24px #52312b0f;z-index:8}
.toolbar .tool-button{position:relative;display:flex;justify-content:center;align-items:center;gap:7px;min-width:44px;min-height:44px;padding:9px 12px;font-size:13px;letter-spacing:0;border-radius:6px;color:var(--ui-text);transition:background-color .15s,color .15s,scale .15s}
.toolbar .tool-button>span{font-size:13px;font-weight:400;white-space:nowrap}
.toolbar #toc-toggle{width:auto;font-size:13px;gap:7px}
.toolbar .edge-tool{padding:10px}
.toolbar svg{width:20px;height:20px;fill:none;stroke:currentColor;stroke-width:1.5;stroke-linecap:round;stroke-linejoin:round;flex-shrink:0}
.toolbar .music-button:after{display:none}
.toolbar .music-button.is-playing{color:var(--accent-solid);background:var(--surface-selected)}
.tool-divider{height:20px;width:1px;background:var(--ui-line);margin-inline:4px}
.tool-button:active:not(:disabled),.music-play:active,.icon-button:active{scale:.96}
.reader-nav{position:fixed;inset:0;transform:none;display:block;width:auto;pointer-events:none;z-index:3}
.reader-nav .nav-arrow{position:absolute;top:calc(50% - 36px);transform:translateY(-50%);width:48px;height:56px;display:grid;place-items:center;padding:9px;border:0;border-radius:10px;background:transparent;color:#755c57;pointer-events:auto;transition:background-color .15s,color .15s}
#prev{left:18px}#next{right:18px}
.reader-nav .nav-arrow svg{width:30px;height:30px;stroke-width:1.5}
.toolbar .tool-button:after,.nav-arrow:after{content:attr(data-tip);position:absolute;inset:auto auto calc(100% + 10px) 50%;transform:translateX(-50%);background:#433d3b;color:#fffdfb;padding:6px 9px;border-radius:5px;font:12px/1.5 var(--ui);white-space:nowrap;pointer-events:none;opacity:0;visibility:hidden;transition:opacity .15s}
.nav-arrow:after{bottom:auto;top:calc(100% + 8px)}
.toolbar .tool-button:focus-visible:after,.nav-arrow:focus-visible:after{opacity:1;visibility:visible}

.side-panel{width:min(368px,calc(100vw - 24px));padding:28px;background:var(--surface);color:var(--ui-text);box-shadow:0 8px 36px #433d3b1a;overscroll-behavior:contain}
.panel-shade{background:#433d3b26;backdrop-filter:none}
.panel-head{margin-bottom:28px;align-items:center}
.panel-head .eyebrow{display:none}
.panel-head h2{font:500 23px/1.4 var(--ui);letter-spacing:0;margin:0}
.panel-head .icon-button{width:44px;height:44px;border-radius:50%;color:var(--ui-secondary);margin-inline-end:-10px}
.search-wrap{border:0;border-radius:8px;background:var(--surface-hover);padding-inline:12px;gap:8px}
.search-wrap>span{font-size:25px;color:var(--ui-secondary)}
.search-wrap input{font-size:16px;color:var(--ui-text)}
.search-wrap:focus-within{background:var(--surface-hover);outline:2px solid var(--ui-focus);outline-offset:2px}
.search-status,.panel-foot,#contents .toc-page,#search-results small{color:var(--ui-secondary)}
#contents button,#search-results button{padding:12px 10px;border-radius:6px;min-height:44px}
#contents button:hover,#search-results button:hover{background:transparent;color:var(--ui-text)}
#contents button.active,#contents button.active:hover{background:var(--surface-selected);color:var(--ui-text)}
#contents button.level3{color:var(--ui-secondary)}
#contents .toc-chapter{color:var(--ui-text);font-family:var(--ui);font-weight:500;border-color:var(--ui-line)}
.note-intro{font:15px/1.8 var(--ui);color:var(--ui-secondary);margin:0 0 28px}
#note-form label{font-size:13px;color:var(--ui-text);margin:22px 0 9px}
#note-form input,#note-form textarea{border:1px solid var(--ui-line);background:var(--surface-hover);border-radius:8px;font:16px/1.8 var(--ui);padding:11px 12px;color:var(--ui-text)}
#note-form textarea{min-height:170px}
.submit-note{background:var(--accent-solid);color:#fffdfb;padding:13px 16px;min-height:48px;border-radius:8px;font-size:14px;margin-top:22px;align-items:center}

#music-dialog{width:min(460px,calc(100vw - 32px));max-height:calc(100svh - 40px);padding:24px;border:0;border-radius:16px;background:var(--surface);color:var(--ui-text);box-shadow:0 0 0 1px #00000006,0 24px 80px #433d3b33}
#music-dialog::backdrop{background:#433d3b45}
.music-header{align-items:center;gap:12px;margin-bottom:20px}
.music-header h2{font:600 20px/1.55 var(--ui);margin:0;text-wrap:initial;letter-spacing:0}
.music-header .icon-button{margin:0 -8px 0 0;width:44px;height:44px;color:var(--ui-secondary)}
#music-dialog .icon-button svg{width:20px;height:20px}
.music-tracks{max-height:min(49svh,408px);border:0;margin:0 -8px;scrollbar-color:#bbb0aa transparent}
.music-tracks li{border:0}
.music-track{min-height:64px;padding:12px 10px;gap:12px;border-radius:8px;color:var(--ui-text);background:transparent}
.music-track[aria-current]{background:var(--surface-selected)}
.music-track[aria-current] .track-title{font-weight:600}
.track-number{font:12px var(--ui);font-variant-numeric:tabular-nums;min-width:20px;color:var(--ui-secondary)}
.track-copy{gap:3px}
.track-title{font-size:14px;line-height:1.5;overflow-wrap:break-word}
.track-artist{font-size:12px;color:var(--ui-secondary);line-height:1.5}
.track-state{color:var(--ui-text);width:16px;text-align:center;flex-shrink:0}
#music-dialog .track-state svg{width:16px;height:16px;stroke-width:2}
.track-selected{font-size:20px}
.music-player{margin-top:20px;padding-top:14px;border-top:1px solid var(--ui-line)}
.music-transport{gap:18px;align-items:flex-start}
.music-play{position:relative;display:block;flex-shrink:0;width:44px;height:44px;min-height:44px;margin-top:0;padding:10px;background:transparent;color:var(--ui-text);border-radius:50%;transition:background-color .15s,scale .15s}
#music-dialog .music-play svg{position:absolute;inset:10px;width:24px;height:24px;fill:currentColor;stroke:none;transition:opacity .15s,scale .15s,filter .15s;transition-timing-function:cubic-bezier(.2,0,0,1)}
.music-play .play-symbol{translate:1px 0}
.music-play .pause-symbol,.music-play.is-active .play-symbol{opacity:0;scale:.25;filter:blur(4px)}
.music-play.is-active .pause-symbol{opacity:1;scale:1;filter:blur(0)}
.music-progress{padding-top:0}
#music-seek{appearance:none;-webkit-appearance:none;background:transparent;height:28px;width:100%;margin:0;accent-color:var(--ui-text);--progress:0%}
#music-seek::-webkit-slider-runnable-track{height:4px;border-radius:4px;background:linear-gradient(to right,var(--ui-text) var(--progress),var(--ui-line) var(--progress))}
#music-seek::-webkit-slider-thumb{appearance:none;-webkit-appearance:none;width:10px;height:10px;border-radius:50%;margin-top:-3px;background:var(--ui-text)}
#music-seek::-moz-range-track{height:4px;border-radius:4px;background:var(--ui-line)}
#music-seek::-moz-range-progress{height:4px;border-radius:4px;background:var(--ui-text)}
#music-seek::-moz-range-thumb{width:10px;height:10px;border:0;border-radius:50%;background:var(--ui-text)}
.music-time{font-size:10px;color:var(--ui-secondary)}
.toolbar button:focus-visible,.nav-arrow:focus-visible,.side-panel button:focus-visible,#music-dialog :focus-visible,#share-dialog :focus-visible{outline:2px solid var(--ui-focus);outline-offset:3px}
#note-form input:focus-visible,#note-form textarea:focus-visible{outline:2px solid var(--ui-focus);outline-offset:2px;box-shadow:none;border-color:var(--ui-line)}
.loading{bottom:96px;background:var(--surface);color:var(--ui-secondary);border-radius:8px;box-shadow:0 4px 18px #433d3b12}
#announcement,#qa-results{top:0;left:0;margin:0}
@media(hover:hover){
  .toolbar .tool-button:hover:not(:disabled),.reader-nav .nav-arrow:hover:not(:disabled),.music-play:hover,.music-header .icon-button:hover,.panel-head .icon-button:hover{background:var(--surface-hover)}
  .toolbar .tool-button:hover:not(:disabled):after,.reader-nav .nav-arrow:hover:not(:disabled):after{opacity:1;visibility:visible}
  #contents button:hover,#search-results button:hover,.music-track:hover{background:var(--surface-hover);color:var(--ui-text)}
  #contents button.active:hover,.music-track[aria-current]:hover{background:var(--surface-selected);color:var(--ui-text)}
}
@media(max-width:800px){
  .desk{padding:24px 26px 110px;min-height:100svh;align-items:center}
  .book-stage{margin:0}
  .book,.book.open,.book.closed-back{transform:none}
  .book.opening,.book.closing,.book.rewinding,.book.rewinding.rewind-from-back{animation:none}
  .book.opening .open-leaf{transform-origin:center;animation-duration:.38s}
  .book.closing .close-leaf{left:0;width:100%;transform-origin:center;animation-duration:.38s}
  .return-leaf{width:100%;transform-origin:center}
  .book.rewinding .return-leaf{animation-duration:.38s}
  .reader-nav .nav-arrow{width:40px;height:52px;border-radius:8px;top:calc(50% - 44px);padding:8px 2px}
  #prev{left:0}#next{right:0}
  .reader-nav .nav-arrow svg{width:23px;height:23px}
  .reader-nav .nav-arrow:after{display:none}
  .toolbar{height:58px;padding:7px 8px;gap:0;bottom:max(18px,env(safe-area-inset-bottom))}
  .toolbar .tool-button{padding-inline:10px;font-size:13px;gap:6px;width:auto}
  .toolbar .tool-divider{margin-inline:2px}
  .side-panel{padding:24px}
}
@media(max-width:540px){
  .toolbar .tool-button{padding-inline:8px}
  .toolbar .tool-button>span{display:none}
  .toolbar .tool-divider{margin-inline:3px}
}
@media(max-width:360px){
  #music-dialog{padding:20px;width:calc(100vw - 24px)}
  .music-header h2{font-size:18px}
  .music-track{padding:11px 8px;gap:9px}
  .music-transport{gap:12px}
}
@media(prefers-reduced-motion:reduce){.book,.book.opening,.book.closing,.book.rewinding,.return-leaf,.open-leaf,.close-leaf{animation:none!important}.music-play svg,.tool-button,.side-panel{transition:none!important}}
@media(forced-colors:active){button:focus-visible,input:focus-visible,textarea:focus-visible{outline:2px solid Highlight!important}.toolbar,#music-dialog,#share-dialog{border:1px solid CanvasText}#music-seek{appearance:auto}}

/* Sharing stays entirely on-device until the visitor chooses a destination. */
#share-dialog{width:min(400px,calc(100vw - 32px));max-height:calc(100svh - 32px);padding:24px;border:0;border-radius:16px;background:var(--surface);color:var(--ui-text);box-shadow:0 0 0 1px #00000006,0 24px 80px #433d3b33;overscroll-behavior:contain;font-family:var(--ui)}
#share-dialog::backdrop{background:#433d3b45}
.share-header{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-bottom:22px}
.share-header h2{margin:0;font:600 20px/1.55 var(--ui)}
.share-header .icon-button{width:44px;height:44px;margin-inline-end:-8px;flex-shrink:0;color:var(--ui-secondary);border-radius:50%}
#share-dialog svg{width:24px;height:24px;fill:none;stroke:currentColor;stroke-width:1.5;stroke-linecap:round;stroke-linejoin:round}
.share-header .icon-button svg{width:20px;height:20px}
.share-book{display:flex;align-items:center;gap:20px;padding-bottom:24px;border-bottom:1px solid var(--ui-line);margin-bottom:20px}
.share-cover{width:68px;height:92px;flex-shrink:0;display:grid;place-items:center;background:#53272c url('assets/cover.jpg') center/cover;border-radius:2px 4px 4px 2px;box-shadow:0 0 0 1px #0000001a,0 4px 10px #433d3b1a;color:#e1c598}
#share-dialog .share-cover svg{width:46px;height:56px;fill:currentColor;stroke:none;opacity:.76}
.share-book-title{margin:0 0 8px;font:24px/1.5 var(--serif);letter-spacing:2px}
.share-book-subtitle{margin:0;font:13px/1.7 var(--ui);color:var(--ui-secondary)}
.share-actions{display:grid;grid-template-columns:1fr 1fr;gap:12px}
.share-action{display:flex;flex-direction:column;align-items:center;justify-content:center;gap:12px;padding:16px 8px;min-height:110px;border-radius:10px;font:14px/1.5 var(--ui);color:var(--ui-text)}
.share-action-icon{display:grid;place-items:center;width:44px;height:44px;border-radius:50%;background:var(--surface-hover)}
.wechat-icon{color:#27784d}
#share-dialog .wechat-icon svg{width:28px;height:28px}
.share-action:disabled{opacity:.5;cursor:default}
#share-link-field{margin-top:16px}
#share-link{width:100%;min-height:44px;border:1px solid var(--ui-line);border-radius:8px;background:transparent;color:var(--ui-secondary);font:13px/1.6 var(--ui);padding:10px 12px;text-overflow:ellipsis}
.share-help{margin-top:18px;padding:14px 16px;border-radius:8px;background:var(--surface-hover);text-align:start}
.share-help h3{margin:0 0 6px;font:500 14px/1.6 var(--ui)}
.share-help p,.share-availability,.share-status{font:13px/1.8 var(--ui);color:var(--ui-secondary);margin:0;overflow-wrap:break-word}
.share-availability,.share-status{margin-top:18px;text-align:center}
.share-availability:empty,.share-status:empty{display:none}
.share-system{display:flex;align-items:center;justify-content:center;gap:4px;width:100%;min-height:44px;margin-top:12px;border-radius:8px;font:13px/1.6 var(--ui);color:var(--ui-secondary)}
#share-dialog .share-system svg{width:15px;height:15px}
@media(hover:hover){.share-action:not(:disabled):hover,.share-system:hover,.share-header .icon-button:hover{background:var(--surface-hover)}}
@media(max-width:360px){#share-dialog{padding:20px;width:calc(100vw - 24px)}.share-book{gap:16px}.share-action{padding-inline:4px}}